bcm2835库手册中文版.pdf

发布时间：2022-05-30 发布人：admin 分类：说明书资料大小：0.82M 资料格式：pdf 举报版权申诉

qq_37423690-12228912-bcm2835库手册中文版.pdf-第1页.png

第1页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第2页.png

第2页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第3页.png

第3页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第4页.png

第4页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第5页.png

第5页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第6页.png

第6页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第7页.png

第7页 / 共73页

qq_37423690-12228912-bcm2835库手册中文版.pdf-第8页.png

第8页 / 共73页

用于向库函数传递和从库函数传递的常量

airspayce.com

bcm2835: Constants for passing to and from library functions

库的初始化和管理

airspayce.com

bcm2835: Library initialisation and management

低层寄存器访问

airspayce.com

bcm2835: Low level register access

GPIO寄存器访问

airspayce.com

bcm2835: GPIO register access

SPI

airspayce.com

bcm2835: SPI access

I2C

airspayce.com

bcm2835: I2C access

系统计时器

airspayce.com

bcm2835: System Timer access

PWM

airspayce.com

bcm2835: Pulse Width Modulation

+ Macros | Enumerations | Variables bcm2835: Constants for passing to and from library functions bcm2835 1.62 Main Page Modules Files Examples 用于向库函数传递和从库函数传递的常量宏 #define HIGH 0x1 #define LOW 0x0 #define MIN(a, b) (a < b ? a : b) #define BCM2835_CORE_CLK_HZ 250000000 #define BMC2835_RPI2_DT_FILENAME "/proc/device-tree/soc/ranges" #define BCM2835_PERI_BASE 0x20000000 #define BCM2835_PERI_SIZE 0x01000000 #define BCM2835_RPI2_PERI_BASE 0x3F000000 #define BCM2835_RPI4_PERI_BASE 0xFE000000 #define BCM2835_RPI4_PERI_SIZE 0x01800000 #define BCM2835_ST_BASE 0x3000 #define BCM2835_GPIO_PADS 0x100000 #define BCM2835_CLOCK_BASE 0x101000 #define BCM2835_GPIO_BASE 0x200000 #define BCM2835_SPI0_BASE 0x204000 #define BCM2835_BSC0_BASE 0x205000 #define BCM2835_GPIO_PWM 0x20C000 #define BCM2835_AUX_BASE 0x215000 #define BCM2835_SPI1_BASE 0x215080 #define BCM2835_SPI2_BASE 0x2150C0 #define BCM2835_BSC1_BASE 0x804000 #define BCM2835_PAGE_SIZE (4*1024) #define BCM2835_BLOCK_SIZE (4*1024) #define BCM2835_GPFSEL0 0x0000 #define BCM2835_GPFSEL1 0x0004 #define BCM2835_GPFSEL2 0x0008 http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions #define BCM2835_GPFSEL3 0x000c #define BCM2835_GPFSEL4 0x0010 #define BCM2835_GPFSEL5 0x0014 #define BCM2835_GPSET0 0x001c #define BCM2835_GPSET1 0x0020 #define BCM2835_GPCLR0 0x0028 #define BCM2835_GPCLR1 0x002c #define BCM2835_GPLEV0 0x0034 #define BCM2835_GPLEV1 0x0038 #define BCM2835_GPEDS0 0x0040 #define BCM2835_GPEDS1 0x0044 #define BCM2835_GPREN0 0x004c #define BCM2835_GPREN1 0x0050 #define BCM2835_GPFEN0 0x0058 #define BCM2835_GPFEN1 0x005c #define BCM2835_GPHEN0 0x0064 #define BCM2835_GPHEN1 0x0068 #define BCM2835_GPLEN0 0x0070 #define BCM2835_GPLEN1 0x0074 #define BCM2835_GPAREN0 0x007c #define BCM2835_GPAREN1 0x0080 #define BCM2835_GPAFEN0 0x0088 #define BCM2835_GPAFEN1 0x008c #define BCM2835_GPPUD 0x0094 #define BCM2835_GPPUDCLK0 0x0098 #define BCM2835_GPPUDCLK1 0x009c #define BCM2835_GPPUPPDN0 0x00e4 /* Pin pull-up/down for pins 15:0 */ #define BCM2835_GPPUPPDN1 0x00e8 /* Pin pull-up/down for pins 31:16 */ #define BCM2835_GPPUPPDN2 0x00ec /* Pin pull-up/down for pins 47:32 */ #define BCM2835_GPPUPPDN3 0x00f0 /* Pin pull-up/down for pins 57:48 */ #define BCM2835_GPIO_PUD_ERROR 0x08 #define BCM2835_PADS_GPIO_0_27 0x002c #define BCM2835_PADS_GPIO_28_45 0x0030 #define BCM2835_PADS_GPIO_46_53 0x0034 #define BCM2835_PAD_PASSWRD (0x5A << 24) #define BCM2835_PAD_SLEW_RATE_UNLIMITED 0x10 #define BCM2835_PAD_HYSTERESIS_ENABLED 0x08 #define BCM2835_PAD_DRIVE_2mA 0x00 #define BCM2835_PAD_DRIVE_4mA 0x01 #define BCM2835_PAD_DRIVE_6mA 0x02 #define BCM2835_PAD_DRIVE_8mA 0x03 http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions #define BCM2835_PAD_DRIVE_10mA 0x04 #define BCM2835_PAD_DRIVE_12mA 0x05 #define BCM2835_PAD_DRIVE_14mA 0x06 #define BCM2835_PAD_DRIVE_16mA 0x07 #define BCM2835_AUX_IRQ 0x0000 #define BCM2835_AUX_ENABLE 0x0004 #define BCM2835_AUX_ENABLE_UART1 0x01 #define BCM2835_AUX_ENABLE_SPI0 0x02 #define BCM2835_AUX_ENABLE_SPI1 0x04 #define BCM2835_AUX_SPI_CNTL0 0x0000 #define BCM2835_AUX_SPI_CNTL1 0x0004 #define BCM2835_AUX_SPI_STAT 0x0008 #define BCM2835_AUX_SPI_PEEK 0x000C #define BCM2835_AUX_SPI_IO 0x0020 #define BCM2835_AUX_SPI_TXHOLD 0x0030 #define BCM2835_AUX_SPI_CLOCK_MIN 30500 #define BCM2835_AUX_SPI_CLOCK_MAX 125000000 #define BCM2835_AUX_SPI_CNTL0_SPEED 0xFFF00000 #define BCM2835_AUX_SPI_CNTL0_SPEED_MAX 0xFFF #define BCM2835_AUX_SPI_CNTL0_SPEED_SHIFT 20 #define BCM2835_AUX_SPI_CNTL0_CS0_N 0x000C0000 #define BCM2835_AUX_SPI_CNTL0_CS1_N 0x000A0000 #define BCM2835_AUX_SPI_CNTL0_CS2_N 0x00060000 #define BCM2835_AUX_SPI_CNTL0_POSTINPUT 0x00010000 #define BCM2835_AUX_SPI_CNTL0_VAR_CS 0x00008000 #define BCM2835_AUX_SPI_CNTL0_VAR_WIDTH 0x00004000 #define BCM2835_AUX_SPI_CNTL0_DOUTHOLD 0x00003000 #define BCM2835_AUX_SPI_CNTL0_ENABLE 0x00000800 #define BCM2835_AUX_SPI_CNTL0_CPHA_IN 0x00000400 #define BCM2835_AUX_SPI_CNTL0_CLEARFIFO 0x00000200 #define BCM2835_AUX_SPI_CNTL0_CPHA_OUT 0x00000100 #define BCM2835_AUX_SPI_CNTL0_CPOL 0x00000080 #define BCM2835_AUX_SPI_CNTL0_MSBF_OUT 0x00000040 #define BCM2835_AUX_SPI_CNTL0_SHIFTLEN 0x0000003F #define BCM2835_AUX_SPI_CNTL1_CSHIGH 0x00000700 #define BCM2835_AUX_SPI_CNTL1_IDLE 0x00000080 #define BCM2835_AUX_SPI_CNTL1_TXEMPTY 0x00000040 #define BCM2835_AUX_SPI_CNTL1_MSBF_IN 0x00000002 #define BCM2835_AUX_SPI_CNTL1_KEEP_IN 0x00000001 #define BCM2835_AUX_SPI_STAT_TX_LVL 0xFF000000 #define BCM2835_AUX_SPI_STAT_RX_LVL 0x00FF0000 http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions #define BCM2835_AUX_SPI_STAT_TX_FULL 0x00000400 #define BCM2835_AUX_SPI_STAT_TX_EMPTY 0x00000200 #define BCM2835_AUX_SPI_STAT_RX_FULL 0x00000100 #define BCM2835_AUX_SPI_STAT_RX_EMPTY 0x00000080 #define BCM2835_AUX_SPI_STAT_BUSY 0x00000040 #define BCM2835_AUX_SPI_STAT_BITCOUNT 0x0000003F #define BCM2835_SPI0_CS 0x0000 #define BCM2835_SPI0_FIFO 0x0004 #define BCM2835_SPI0_CLK 0x0008 #define BCM2835_SPI0_DLEN 0x000c #define BCM2835_SPI0_LTOH 0x0010 #define BCM2835_SPI0_DC 0x0014 #define BCM2835_SPI0_CS_LEN_LONG 0x02000000 #define BCM2835_SPI0_CS_DMA_LEN 0x01000000 #define BCM2835_SPI0_CS_CSPOL2 0x00800000 #define BCM2835_SPI0_CS_CSPOL1 0x00400000 #define BCM2835_SPI0_CS_CSPOL0 0x00200000 #define BCM2835_SPI0_CS_RXF 0x00100000 #define BCM2835_SPI0_CS_RXR 0x00080000 #define BCM2835_SPI0_CS_TXD 0x00040000 #define BCM2835_SPI0_CS_RXD 0x00020000 #define BCM2835_SPI0_CS_DONE 0x00010000 #define BCM2835_SPI0_CS_TE_EN 0x00008000 #define BCM2835_SPI0_CS_LMONO 0x00004000 #define BCM2835_SPI0_CS_LEN 0x00002000 #define BCM2835_SPI0_CS_REN 0x00001000 #define BCM2835_SPI0_CS_ADCS 0x00000800 #define BCM2835_SPI0_CS_INTR 0x00000400 #define BCM2835_SPI0_CS_INTD 0x00000200 #define BCM2835_SPI0_CS_DMAEN 0x00000100 #define BCM2835_SPI0_CS_TA 0x00000080 #define BCM2835_SPI0_CS_CSPOL 0x00000040 #define BCM2835_SPI0_CS_CLEAR 0x00000030 #define BCM2835_SPI0_CS_CLEAR_RX 0x00000020 #define BCM2835_SPI0_CS_CLEAR_TX 0x00000010 #define BCM2835_SPI0_CS_CPOL 0x00000008 #define BCM2835_SPI0_CS_CPHA 0x00000004 #define BCM2835_SPI0_CS_CS 0x00000003 #define BCM2835_BSC_C 0x0000 #define BCM2835_BSC_S 0x0004 #define BCM2835_BSC_DLEN 0x0008 http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions #define BCM2835_BSC_A 0x000c #define BCM2835_BSC_FIFO 0x0010 #define BCM2835_BSC_DIV 0x0014 #define BCM2835_BSC_DEL 0x0018 #define BCM2835_BSC_CLKT 0x001c #define BCM2835_BSC_C_I2CEN 0x00008000 #define BCM2835_BSC_C_INTR 0x00000400 #define BCM2835_BSC_C_INTT 0x00000200 #define BCM2835_BSC_C_INTD 0x00000100 #define BCM2835_BSC_C_ST 0x00000080 #define BCM2835_BSC_C_CLEAR_1 0x00000020 #define BCM2835_BSC_C_CLEAR_2 0x00000010 #define BCM2835_BSC_C_READ 0x00000001 #define BCM2835_BSC_S_CLKT 0x00000200 #define BCM2835_BSC_S_ERR 0x00000100 #define BCM2835_BSC_S_RXF 0x00000080 #define BCM2835_BSC_S_TXE 0x00000040 #define BCM2835_BSC_S_RXD 0x00000020 #define BCM2835_BSC_S_TXD 0x00000010 #define BCM2835_BSC_S_RXR 0x00000008 #define BCM2835_BSC_S_TXW 0x00000004 #define BCM2835_BSC_S_DONE 0x00000002 #define BCM2835_BSC_S_TA 0x00000001 #define BCM2835_BSC_FIFO_SIZE 16 #define BCM2835_ST_CS 0x0000 #define BCM2835_ST_CLO 0x0004 #define BCM2835_ST_CHI 0x0008 列举 enum bcm2835RegisterBase { BCM2835_REGBASE_ST = 1, BCM2835_REGBASE_GPIO = 2, BCM2835_REGBASE_PWM = 3, BCM2835_REGBASE_CLK = 4, BCM2835_REGBASE_PADS = 5, BCM2835_REGBASE_SPI0 = 6, BCM2835_REGBASE_BSC0 = 7, BCM2835_REGBASE_BSC1 = 8, BCM2835_REGBASE_AUX = 9, BCM2835_REGBASE_SPI1 = 10 } bcm2835RegisterBase Register bases for bcm2835_regbase() More... enum bcm2835FunctionSelect { BCM2835_GPIO_FSEL_INPT = 0x00, BCM2835_GPIO_FSEL_OUTP = 0x01, BCM2835_GPIO_FSEL_ALT0 = 0x04, BCM2835_GPIO_FSEL_ALT1 = 0x05, BCM2835_GPIO_FSEL_ALT2 = 0x06, BCM2835_GPIO_FSEL_ALT3 = 0x07, BCM2835_GPIO_FSEL_ALT4 = 0x03, BCM2835_GPIO_FSEL_ALT5 = 0x02, BCM2835_GPIO_FSEL_MASK = 0x07 http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions } bcm2835PortFunction Port function select modes for bcm2835_gpio_fsel() More... enum bcm2835PUDControl { BCM2835_GPIO_PUD_OFF = 0x00, BCM2835_GPIO_PUD_DOWN = 0x01, BCM2835_GPIO_PUD_UP = 0x02 } bcm2835PUDControl Pullup/Pulldown defines for bcm2835_gpio_pud() More... enum bcm2835PadGroup { BCM2835_PAD_GROUP_GPIO_0_27 = 0, BCM2835_PAD_GROUP_GPIO_28_45 = 1, BCM2835_PAD_GROUP_GPIO_46_53 = 2 } bcm2835PadGroup Pad group specification for bcm2835_gpio_pad() More... enum RPiGPIOPin { RPI_GPIO_P1_03 = 0, RPI_GPIO_P1_05 = 1, RPI_GPIO_P1_07 = 4, RPI_GPIO_P1_08 = 14, RPI_GPIO_P1_10 = 15, RPI_GPIO_P1_11 = 17, RPI_GPIO_P1_12 = 18, RPI_GPIO_P1_13 = 21, RPI_GPIO_P1_15 = 22, RPI_GPIO_P1_16 = 23, RPI_GPIO_P1_18 = 24, RPI_GPIO_P1_19 = 10, RPI_GPIO_P1_21 = 9, RPI_GPIO_P1_22 = 25, RPI_GPIO_P1_23 = 11, RPI_GPIO_P1_24 = 8, RPI_GPIO_P1_26 = 7, RPI_V2_GPIO_P1_03 = 2, RPI_V2_GPIO_P1_05 = 3, RPI_V2_GPIO_P1_07 = 4, RPI_V2_GPIO_P1_08 = 14, RPI_V2_GPIO_P1_10 = 15, RPI_V2_GPIO_P1_11 = 17, RPI_V2_GPIO_P1_12 = 18, RPI_V2_GPIO_P1_13 = 27, RPI_V2_GPIO_P1_15 = 22, RPI_V2_GPIO_P1_16 = 23, RPI_V2_GPIO_P1_18 = 24, RPI_V2_GPIO_P1_19 = 10, RPI_V2_GPIO_P1_21 = 9, RPI_V2_GPIO_P1_22 = 25, RPI_V2_GPIO_P1_23 = 11, RPI_V2_GPIO_P1_24 = 8, RPI_V2_GPIO_P1_26 = 7, RPI_V2_GPIO_P1_29 = 5, RPI_V2_GPIO_P1_31 = 6, RPI_V2_GPIO_P1_32 = 12, RPI_V2_GPIO_P1_33 = 13, RPI_V2_GPIO_P1_35 = 19, RPI_V2_GPIO_P1_36 = 16, RPI_V2_GPIO_P1_37 = 26, RPI_V2_GPIO_P1_38 = 20, RPI_V2_GPIO_P1_40 = 21, RPI_V2_GPIO_P5_03 = 28, RPI_V2_GPIO_P5_04 = 29, RPI_V2_GPIO_P5_05 = 30, RPI_V2_GPIO_P5_06 = 31, RPI_BPLUS_GPIO_J8_03 = 2, RPI_BPLUS_GPIO_J8_05 = 3, RPI_BPLUS_GPIO_J8_07 = 4, RPI_BPLUS_GPIO_J8_08 = 14, RPI_BPLUS_GPIO_J8_10 = 15, RPI_BPLUS_GPIO_J8_11 = 17, RPI_BPLUS_GPIO_J8_12 = 18, RPI_BPLUS_GPIO_J8_13 = 27, RPI_BPLUS_GPIO_J8_15 = 22, RPI_BPLUS_GPIO_J8_16 = 23, RPI_BPLUS_GPIO_J8_18 = 24, RPI_BPLUS_GPIO_J8_19 = 10, RPI_BPLUS_GPIO_J8_21 = 9, RPI_BPLUS_GPIO_J8_22 = 25, RPI_BPLUS_GPIO_J8_23 = 11, RPI_BPLUS_GPIO_J8_24 = 8, RPI_BPLUS_GPIO_J8_26 = 7, RPI_BPLUS_GPIO_J8_29 = 5, RPI_BPLUS_GPIO_J8_31 = 6, RPI_BPLUS_GPIO_J8_32 = 12, RPI_BPLUS_GPIO_J8_33 = 13, RPI_BPLUS_GPIO_J8_35 = 19, RPI_BPLUS_GPIO_J8_36 = 16, RPI_BPLUS_GPIO_J8_37 = 26, RPI_BPLUS_GPIO_J8_38 = 20, RPI_BPLUS_GPIO_J8_40 = 21 } GPIO Pin Numbers. More... enum bcm2835SPIBitOrder { BCM2835_SPI_BIT_ORDER_LSBFIRST = 0, BCM2835_SPI_BIT_ORDER_MSBFIRST = 1 } bcm2835SPIBitOrder SPI Bit order Specifies the SPI data bit ordering for bcm2835_spi_setBitOrder() http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions More... enum bcm2835SPIMode { BCM2835_SPI_MODE0 = 0, BCM2835_SPI_MODE1 = 1, BCM2835_SPI_MODE2 = 2, BCM2835_SPI_MODE3 = 3 } SPI Data mode Specify the SPI data mode to be passed to bcm2835_spi_setDataMode() More... enum bcm2835SPIChipSelect { BCM2835_SPI_CS0 = 0, BCM2835_SPI_CS1 = 1, BCM2835_SPI_CS2 = 2, BCM2835_SPI_CS_NONE = 3 } bcm2835SPIChipSelect Specify the SPI chip select pin(s) More... enum bcm2835SPIClockDivider { BCM2835_SPI_CLOCK_DIVIDER_65536 = 0, BCM2835_SPI_CLOCK_DIVIDER_32768 = 32768, BCM2835_SPI_CLOCK_DIVIDER_16384 = 16384, BCM2835_SPI_CLOCK_DIVIDER_8192 = 8192, BCM2835_SPI_CLOCK_DIVIDER_4096 = 4096, BCM2835_SPI_CLOCK_DIVIDER_2048 = 2048, BCM2835_SPI_CLOCK_DIVIDER_1024 = 1024, BCM2835_SPI_CLOCK_DIVIDER_512 = 512, BCM2835_SPI_CLOCK_DIVIDER_256 = 256, BCM2835_SPI_CLOCK_DIVIDER_128 = 128, BCM2835_SPI_CLOCK_DIVIDER_64 = 64, BCM2835_SPI_CLOCK_DIVIDER_32 = 32, BCM2835_SPI_CLOCK_DIVIDER_16 = 16, BCM2835_SPI_CLOCK_DIVIDER_8 = 8, BCM2835_SPI_CLOCK_DIVIDER_4 = 4, BCM2835_SPI_CLOCK_DIVIDER_2 = 2, BCM2835_SPI_CLOCK_DIVIDER_1 = 1 } bcm2835spiclockdivide指定用于从系统时钟生成SPI时钟的分频器。下图给出了除法器、时钟周期和时钟频率。时钟划分基于RPi1和RPi2上250MHz和RPi3上400MHz的名义核心时钟速率。据报道(与文档相反)任何偶数分隔符都可以使用。每个分频器显示的频率已经通过测量RPi1和RPi2得到确认。RPi3上的系统时钟频率是不同的，因此从给定除法器得到的频率是不同的。有关可靠的SPI速度信息，请参阅“SPI引脚”中的注释。注意:可以通过put将RPi 3的核心时钟频率更改回250MHz More... enum bcm2835I2CClockDivider { BCM2835_I2C_CLOCK_DIVIDER_2500 = 2500, BCM2835_I2C_CLOCK_DIVIDER_626 = 626, BCM2835_I2C_CLOCK_DIVIDER_150 = 150, BCM2835_I2C_CLOCK_DIVIDER_148 = 148 } bcm2835i2cclockdivide指定用于从系统时钟生成I2C时钟的分频器。时钟划分是基于250MHz的公称基本时钟速率 More... enum bcm2835I2CReasonCodes { BCM2835_I2C_REASON_OK = 0x00, BCM2835_I2C_REASON_ERROR_NACK = 0x01, BCM2835_I2C_REASON_ERROR_CLKT = 0x02, BCM2835_I2C_REASON_ERROR_DATA = 0x04 } bcm2835I2CReasonCodes指定bcm2835_i2c_write和bcm2835_i2c_read函数的原因代码。More... 变量 off_t bcm2835_peripherals_base size_t bcm2835_peripherals_size uint32_t * bcm2835_peripherals volatile uint32_t * bcm2835_st volatile uint32_t * bcm2835_gpio volatile uint32_t * bcm2835_pwm http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

bcm2835: Constants for passing to and from library functions volatile uint32_t * bcm2835_clk volatile uint32_t * bcm2835_pads volatile uint32_t * bcm2835_spi0 volatile uint32_t * bcm2835_bsc0 volatile uint32_t * bcm2835_bsc1 volatile uint32_t * bcm2835_aux volatile uint32_t * bcm2835_spi1 详细描述这里的值被设计为传递给bcm2835库中的各个函数。宏定义文档 ◆ BCM2835_AUX_BASE #define BCM2835_AUX_BASE 0x215000 AUX 寄存器的基地址 ◆ BCM2835_AUX_ENABLE_SPI0 #define BCM2835_AUX_ENABLE_SPI0 0x02 SPI0 (SPI1 in the device) ◆ BCM2835_AUX_ENABLE_SPI1 #define BCM2835_AUX_ENABLE_SPI1 0x04 SPI1 (SPI2 in the device) ◆ BCM2835_AUX_IRQ #define BCM2835_AUX_IRQ 0x0000 xxx http://www.airspayce.com/mikem/bcm2835/group__constants.html[2020/1/28 11:01:35]

分享到：

赞收藏

相关推荐